package com.itheima.reggie.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.itheima.reggie.common.CustomException;
import com.itheima.reggie.entity.Category;
import com.itheima.reggie.entity.Dish;
import com.itheima.reggie.entity.Employee;
import com.itheima.reggie.entity.Setmeal;
import com.itheima.reggie.mapper.CategoryMapper;
import com.itheima.reggie.mapper.EmployeeMapper;
import com.itheima.reggie.service.CategoryService;
import com.itheima.reggie.service.DishService;
import com.itheima.reggie.service.EmployeeService;
import com.itheima.reggie.service.SetmealService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

@Service
public class CategoryServiceImpl extends ServiceImpl<CategoryMapper, Category> implements CategoryService {

    @Autowired
    private DishService dishService;
    @Autowired
    private SetmealService setmealService;
    @Override
    public void delete(long id) {
        //添加查询条件，1.根据分类id进行查询菜品数据
        LambdaQueryWrapper<Dish> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(Dish::getCategoryId,id);
        int count = dishService.count(queryWrapper);
        //如果不为空，说明有关联的菜品，不能删除
        if(count>0) {
            throw new CustomException("该分类关联了菜品，不能删除");
        }
    //2查询当前分类是否关联了套餐，如果已经关联，抛出一个业务异常
        LambdaQueryWrapper<Setmeal> queryWrapper1 = new LambdaQueryWrapper<>();
        queryWrapper1.eq(Setmeal::getCategoryId,id);
        int count1 = setmealService.count(queryWrapper1);
        //如果不为空，说明有关联的菜品，不能删除
        if(count1>0) {
            throw new CustomException("该分类关联了套餐，不能删除");
        }

        //3.该分类下没有关联菜品或者套餐，可以直接删除
        super.removeById(id);
    }
}
